Data Logging & Control ICT GCSE
Data Logging <ul><li>The automated collection of data over a period of time </li></ul>
Sensors <ul><li>Sensors are used to take readings or measurements </li></ul><ul><li>They record things such as: </li></ul>...
Analogue and Digital Data <ul><li>Digital </li></ul><ul><ul><li>Made up of 0s and 1s </li></ul></ul><ul><ul><li>Each 1 or ...
Example <ul><li>Hospitals </li></ul><ul><ul><li>When a patient has had a major operation or is very ill they may be put in...
Other Uses <ul><li>Taking readings during science experiments </li></ul><ul><li>Weather stations </li></ul><ul><li>Recordi...
Advantages and Disadvantages <ul><li>Advantages </li></ul><ul><li>Can be used in remote or dangerous locations </li></ul><...
Control <ul><li>Using a computer to control the actions and movement of an object </li></ul><ul><li>Sensors are also used ...
Control <ul><li>Once the input data has been received by the computer it can begin to process it </li></ul>Process Input
Control <ul><li>Once the data has been processed and a decision has been made the computer will send a signal to the outpu...
Example <ul><li>Central Heating System </li></ul>Is it too cold? B A Is it too hot? C A = Temperature Sensor ( Input ) B =...
Example <ul><li>Central Heating System </li></ul>Is it too cold? B A Is it too hot? C A = Temperature Sensor ( Input ) B =...
Example <ul><li>Central Heating System </li></ul>Is it too cold? B A Is it too hot? C A = Temperature Sensor ( Input ) B =...
Instructions <ul><li>You write sequences of instructions in order to control devices, for example a robot which is designe...
Instructions Stop Forward 40 Instruction Right 90 Forward 40 Right 90 Forward 40 Right 90 Forward 40
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Data Logging And Control

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Data Logging And Control

  1. 1. Data Logging & Control ICT GCSE
  2. 2. Data Logging <ul><li>The automated collection of data over a period of time </li></ul>
  3. 3. Sensors <ul><li>Sensors are used to take readings or measurements </li></ul><ul><li>They record things such as: </li></ul><ul><ul><li>Wind Speed </li></ul></ul><ul><ul><li>Temperature </li></ul></ul><ul><ul><li>pH </li></ul></ul><ul><ul><li>Pressure </li></ul></ul><ul><ul><li>Voltage </li></ul></ul><ul><ul><li>Heart Rate </li></ul></ul>
  4. 4. Analogue and Digital Data <ul><li>Digital </li></ul><ul><ul><li>Made up of 0s and 1s </li></ul></ul><ul><ul><li>Each 1 or 0 is a bit </li></ul></ul><ul><ul><li>Groups of bits can be coded together to represent data </li></ul></ul><ul><li>Analogue </li></ul><ul><ul><li>An analogue signal can be any value </li></ul></ul><ul><ul><li>An example of analogue data is a sound wave such as the human voice </li></ul></ul>An interface box is used to convert analogue signals from sensors into digital signals which can be processed by a computer
  5. 5. Example <ul><li>Hospitals </li></ul><ul><ul><li>When a patient has had a major operation or is very ill they may be put in the intensive care unit (ICU) </li></ul></ul><ul><ul><li>Several sensors are used to monitor their condition: </li></ul></ul><ul><ul><ul><li>Heart Rate </li></ul></ul></ul><ul><ul><ul><li>Oxygen levels </li></ul></ul></ul><ul><ul><ul><li>Temperature </li></ul></ul></ul><ul><ul><ul><li>This data is displayed as digital numbers or in the form of a graph </li></ul></ul></ul>
  6. 6. Other Uses <ul><li>Taking readings during science experiments </li></ul><ul><li>Weather stations </li></ul><ul><li>Recording traffic levels </li></ul><ul><li>Recording pollution levels </li></ul><ul><li>Central heating systems </li></ul>
  7. 7. Advantages and Disadvantages <ul><li>Advantages </li></ul><ul><li>Can be used in remote or dangerous locations </li></ul><ul><li>24/7 </li></ul><ul><li>Automated </li></ul><ul><li>Often more accurate </li></ul><ul><li>No need for a human to be present </li></ul><ul><li>Disadvantages </li></ul><ul><li>Equipment could break down </li></ul><ul><li>Can be expensive </li></ul><ul><li>The recordings will only be taken at the intervals set up, if something unexpected happens it may not be recorded </li></ul>
  8. 8. Control <ul><li>Using a computer to control the actions and movement of an object </li></ul><ul><li>Sensors are also used in control, these are known as inputs </li></ul>Input
  9. 9. Control <ul><li>Once the input data has been received by the computer it can begin to process it </li></ul>Process Input
  10. 10. Control <ul><li>Once the data has been processed and a decision has been made the computer will send a signal to the output device </li></ul>Process Output Input
  11. 11. Example <ul><li>Central Heating System </li></ul>Is it too cold? B A Is it too hot? C A = Temperature Sensor ( Input ) B = Heating On ( Output ) C = Heating Off ( Output ) Too Hot
  12. 12. Example <ul><li>Central Heating System </li></ul>Is it too cold? B A Is it too hot? C A = Temperature Sensor ( Input ) B = Heating On ( Output ) C = Heating Off ( Output ) Too Cold
  13. 13. Example <ul><li>Central Heating System </li></ul>Is it too cold? B A Is it too hot? C A = Temperature Sensor ( Input ) B = Heating On ( Output ) C = Heating Off ( Output ) Too Hot
  14. 14. Instructions <ul><li>You write sequences of instructions in order to control devices, for example a robot which is designed to draw designs </li></ul>
  15. 15. Instructions Stop Forward 40 Instruction Right 90 Forward 40 Right 90 Forward 40 Right 90 Forward 40

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